Deposition of marine organic matter in coastal upwelling systems is the main sink for phosphorus in the oceans (Benitez-Nelson, 2000), and most phosphorite deposits presumably originated in this oceanographic setting.As the content of phosphorus in the marine organic matter is close to 1 %, the accumulation of a large phosphorite deposit requires many cycles of mud …
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Phosphorite ores are vital nonrenewable resources and essential components in phosphorous-based chemicals and agricultural fertilizers [1]. One of the major products of phosphorite ore plants in China is a large composite …
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Clay minerals provide indicators of the evolution of aqueous conditions and possible habitats for life on ancient Mars. Analyses by the Mars Science Laboratory rover Curiosity show that ~3.5 ...
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Through field geological investigations; mineralogical, geochemical, Sr–Nd isotope analyses; and tectonic characteristics, the material source, sedimentary environment and …
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Download scientific diagram | Y-K-edge XANES spectra. from publication: Occurrence of yttrium in the Zhijin phosphorus deposit in Guizhou Province, China | The Zhijin phosphorite (P)-bearing rare ...
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Phosphorite concretions are recorded for the first time within the lower part of the Umm Rijam Chert Limestone Formation (Eocene) in the Ma'an area, southern Jordan. The phosphorite concretions are typically hosted and encountered as individual layer in moderately lithified sediments of marl, chalk and chalky marl.
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Based on the analysis of the chemical compositions and mineral components of the phosphorite in Zhijin, Guizhou, the chemical phase analysis experiment was made and the occurrence state of the rare earth elements in the dolomitic and siliceous phosphorite of Zhijin, Guizhou, was quantitatively analyzed. The results showed that rare earth elements of dolo-mitic phosphorite …
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The Zhijin phosphorite (P)-bearing rare earth element (REE) deposit in Guizhou Province (China) hosts vast ore resources (P: 1.348 billion tonnes; REE: 1.44 Mt). Up to date, the Zhijin phosphorite resource has not been exploited because of the uncertain occurrence of the associated REEs, which hampers mineral processing and extraction. In this study, the structure, the valence …
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The article is dedicated to regularities in the distribution of sedimentary phosphorite and manganese deposits in the Lower Paleozoic and Proterozoic formations.
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An important 20 syvyi et all 2019 / Gospodarka surowcami Mineralnymi – Mineral Resources Management 35(4), 5–26 condition for the efficient functioning of such mining enterprises is the conclusion of future contracts for the product supply to consumers (Brahin 2003b). evaluation of phosphorite ores for chemical processing can consider the ...
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Phosphorite is an important nonmetallic mineral resource in the ocean. The total amount of the P2O5 resource is about 20×109 tons in the ocean. Marine phosphorites are …
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Phosphorite deposits of Late Cretaceous and Paleogene age are well known in the Iraqi Western Desert. ... varying pH of sediment and pore-fluids and physico-chemical conditions of the depositional site. ... 9:497 DOI 10.1007/s12517-016-2508-5 ORIGINAL PAPER New occurrence of potential phosphate resource in northeast Jordan Khalil M. Ibrahim 1 ...
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The rare earth elements (REEs)‐bearing phosphorite was a potential REE resource, which contained all REEs except polonium, among them lanthanide, cerium, neodymium, and …
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Several examples of phosphorite weathering (Morocco, Senegal, Israel), are studied. Weathering of phosphorites is shown to begin by loss of CO 2 from the carbonate-fluor-apatite, which tends toward a fluor-apatite; dolomite loses its Mg, then calcite is leached. When calcium carbonates are eliminated, calcium apatite transforms to aluminum- or iron-phosphates.
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The specific characteristics of phosphorite deposits can vary widely based on factors such as geological history, environmental conditions, and the types of organisms …
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This element, also critical in a host of industrial applications, is a nonrenewable resource that is sourced primarily from the phosphatic mineral apatite, hosted in sedimentary and igneous ores. World phosphate resources are estimated by the U.S. Geological Survey at ca. 300,000 Mt, of which 95% are sedimentary and 5% are igneous.
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McELHINNY (1979) identifies an episodic occurrence of major phosphorite deposition rather than being a persistent phenomenon (Fig. 10.1). Some progress in dating of some of the early Phanerozoic phosphorites as well as some new calculations to resource sizes in …
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Under the same conditions, Dolo in phosphorite was more easily leached by CA, while Fap was further enriched. ... containing phosphate rock is a potential REs resource. The unclear occurrence ...
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Phosphorite, characterized by its high phosphorus concentration, is an essential resource of fertilizer production and plays a vital role in global food production (Summerhayes et al., 1973; Pufahl and Groat, 2017).Moreover, phosphorite has been recognized as a potential source of uranium resources due to its naturally high uranium content (Ulrich et al., 2014; …
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Phosphate rocks, also referred to as phosphorites, are sedimentary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P …
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An exploration program aided by field investigation, exploration drilling, detailed sampling, lithological and petrological studies, geochemical investigation, and resource calculation leads to the discovery of a potential phosphate resource in northeast Jordan close to the international border with Saudi Arabia and Iraq. The studied phosphate is of the Middle …
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strata containing phosphorite resources in China. The early Cambrian Zhijin phosphorite in Guizhou Province, China, has high rare earth element and yttrium (REY) contents of up to 2500 ppm, with
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The first part of this publication outlines the course of phosphorite research with emphasis on some of the major breakthroughs: the discovery of phosphate nodules on the present sea-floor, the recognition of F-carbonate-apatite as a separate mineral species, Kasakov's (1937) upwelling theory and the discovery of Recent marine phosphorites, as proven by the U-disequilibrium …
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The reserve of rare-earth element-bearing phosphorite ores in Guizhou province in western China is huge. Increased demand for the different products manufactured from rare-earth elements has resulted in an extreme need for reasonable and comprehensive extraction of rare-earth elements. An improved understanding of rare-earth element occurrence states in single …
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Rare earth elements (REEs) are associated with phosphorite, which is an important strategic reserve resource. During sorting process of phosphorite, REEs may move with specific host minerals, however, occurrence state and moving pattern of REEs from rock to products …
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The mean δ¹⁸OPDB isotope value of the phosphorite-bearing host carbonate section is −5.5‰ (range from −4 to −7.68, n:11), which is lower than the Cretaceous average of English chalk ...
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Phosphate rocks, an important ore resource in Guizhou Province, China, are mainly hosted within the Sinian Doushantuo Formation and the Cambrian Meishucun Formation. In addition, the phosphate rocks of the Cambrian Meishucun Formation are rich in biological fossils. Although numerous studies investigating the genesis of phosphate deposits have been …
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